Hello everyone, I was trying to migrate a static mesh (and its materials and textures) from an UE4 project to another. When I click asset actions → migrate, the editor says there are some textures that will be migrate too. But I checked all the static mesh’s materials and material instances that these textures are not used. Can someone please tell me why and how to fix this. Many thanks!
They might not look like they’re related, but I think you’ll find if you hunt around very carefully they are! 
2 Likes
@ClockworkOcean Yes, I saw these textures in the Size Map window from the material instance. But the master material of this material instance is very simple and can not be referring any of these textures. And I tried to the Clean Up button of the master material editor, it won’t work.
There will be a connection between this asset and the others ( it may not be via the material ). Take a look in the reference viewer
( that’s just for the blue cube )
@ClockworkOcean emmm, I do see these texture references. And there is one thing I think I forget to tell you. The original master material did use these textures in some material expression nodes. But I have deleted all these nodes in master material. So I get confused why these textures are still referenced by the child material instances even if I already deleted these references in master material. Anyway thanks a lot for your help 
1 Like